Combination lock with tumbler upsetting mechanism



Jan. 13, 1953 o. H. EIFFERT ETAL COMBINATION LOCK WITH TUMBLER UPSETIING MECHANISM Filed Oct. 3 1950 2 SHEETS-Sl-IEET l INVENTORS. OTTO h! E/FFERT B HOMIRD S. THOMAS, JR

ATTORNEY Jan. 13, 1953 O EIFFERT ETAL 2,625,032

COMBINATION LOCK WITH TUMBLER UPSETTING MECHANISM Filed 061'. 3, 1950 2 SHEET$SI'EET 2 A TIURNE Y P Q 1 w w 4 w NQY 2 M 3 5 Y kgfi 4 Mrs 2 x 40 mW I 4 NEH 34 JI I 3 x 4 5 a 6 a T5 7 w F m 6 4 ,I 8 9 m m M 3 W E! G a 6 w a W5 7 w 8 M 3 3 4 I 9 .w e m M 3 D I 9L1 ma L1 8 5 7 M E n W Wk m m F L ,V 1 u H .3 VIII vl'l 4 g Patented Jan. 13, 1953 COMBINATION LOCK WITH TUMBLER UPSETTING MECHANISM Otto H. Elliott and Howard S. Thomas, Jr., Rochester, N. Y., assignors to Sargent & Greenleai', Inc., Rochester, N. Y., a corporation of New York Application October 3, 1950, Serial No. 188,193

13 Claims. (CI. 70-23) This invention relates to a tumbler upsetting mechanism for combination looks, with particular reference to a combination padlock for use on drawers, cabinets, and the like, where it is desirable to secure the lock to a hasp staple that is concealed by the lock housing and inaccessible when locked, and has for its object to afford a compact, simple, and practical contsruction than can be economically manufactured, requires few parts, and is characterized by sturdiness and reliability, requiring little servicing or repair.

In the operation of combination tumbler looks, after the dial has been manipulated to move the tumblers to releasing position and the bolt moved to unlocking position, it is possible to move the dial slightly and restore the bolt to locking position without changing the position of the tumblers so that the lock can easily be opened by moving the dial slightly in the reverse direction to again move the bolt to unlocking position, the lock being sometimes inadvertently left in this condition so that an unauthorized person can readily open the same, and it is a particular purpose of this invention to provide a simple and practical mechanism that automatically upsets the tumbler combination or scrambles the tumblers as the bolt moves to locking position and by the time the bolt reaches locking position, so that the lock cannot again be opened without dialing the combination.

A further object of thhe invention is to afford a combination lock mechanism having a reciprocatory bolt plate and providing the bolt plate with a mechanism that engages and positively moves one or more of the tumblers whenever the bolt plate is moved from unlocked to locked position.

Another object of the invention is to aiiord a structure that is adaptable to a combination padlock of small size and compact arrangement, having a bolt plate arranged beneath the drive wheel and tumblers and between the drive wheel and rear wall of the housing, the bolt plate being provided with a tumbler upsetting device movably supported thereon which engages one or more of the tumblers when the bolt plate moves to unlocking position and acts to upset or change the position of the tumblers as the bolt plate moves to locked position when the fence is disengaged from the tumbler gates and the tum blers are released.

An additional object of the invention is to provide a simple and practical arrangement requiring a small number of parts which can be economically manufactured and is adapted to the operation of a combination padlock that conceals a hasp staple when secured thereto, the tumbler upsetting mechanism being of such arrangement as not to necessitate any enlargement of the lock housing or to change the relation of the tumblers and bolt plate when moving the bolt to unlocked position.

To these and other ends, the invention consists in the construction and arrangement of parts that will appear clearly from the following description when read in conjunction with the accompanying drawings, the novel features being pointed out in the claims following the specification.

In the drawings:

Fig. 1 is a view in front elevation showing a padlock constructed in accordance with one embodiment of the invention;

Fig. 2 is a rear elevation of the same;

Fig. 3 is a plan view of the mechanism with the rear wall removed, showing the bolt and tumbler upsettin mechanism in normal or locked position, the fence lever being disengaged from the tumblers and drive wheel;

Fig. 4 is a similar view showing the bolt in unlocked position with the fence lever engaged with the drive wheel and tumblers, and the tumbler upsetting catch engaged with the tumblers preparatory to moving the tumblers when the bolt is returned to locked position and the fence lever disengaged from the tumblers;

Fig. 5 is a plan view of the bolt plate;

Fig. 6 is a view in side elevation of the bolt plate;

Fig. 7 is a longitudinal sectional view showing the tumbler upsetting mechanism in side elevation, with the bolt plate and tumbler upsetting catch in normal or locked position as in Fig. 3:

Fig. 8 is a view similar to Fig. 7, with the bolt and bolt plate in unlocked position and the tumbler upsetting catch engaged with the tumblers preparatory to moving the tumblers when they are released from the fence lever;

Fig. 9 is a view similar to Fig. 8, showing the position of the parts when the bolt and bolt plate have been moved back toward locking position and just before release of the tumblers and tumbler upsetting catch, and

Fig. 10 is a transverse sectional view taken on line Ifl-HI of Fig. 9 looking in the direction indicated.

Referring more particularly to the drawings in which like reference numerals refer to the same parts throughout the several views. the structure comprises a housing including a front wall I, integral side walls 2, a circularly curved integral end wall 3 at one end of the housing, a straight integral end wall 4 at the opposite end of the housing, and a rear wall 5 which is attached to the side and end walls as shown or in any suitable manner. Journalled in the front wall i is an arbor 6 which has fixed thereto the dial 1 arranged on the front of the housing and movable to turn the arbor G and control the tumblers as will appear presently.

The arbor 6 at its inner end is provided with a shoulder 23 upon which is supported the bolt plate in a manner that will appear presently, and E! designates a drive wheel fixedly mounted on the arbor 6, the drive wheel 9 being notched at ll on its periphery for cooperation with the fence lever to be referred to hereinafter, while [2 designate the several tumblers rotatably mounted on the arbor 6 and each provided with a gate 13. for operation in the usual fashion of tumbler combination locks according to which the dial is turned in opposite directions alternately for predetermined numbers of turns until the gates I?! of all the tumblers are in alinement to release the fence lever, whereupon further rotation of the dial and drive wheel efiects operation of the fence lever, both plate and bolt in a manner that will now be described.

The tumblers l2 are mounted between the drive wheel 9 and the front wall I of the housing with their circular edges adjacent to the curved end wall 3 of the housing so that the parts can be arranged compactly and occupy a minimum space, and to accomplish this there is provided a slidable bolt plate comprising a body portion l4 which underlies the drive wheel and tumblers and is slotted at l5. the slotted portion of the bolt plate embracing the reduced end of the arbor E5 and guided on the shoulder 8 of the arbor, between it and the rear wall 5. H3 designates a cylindrical bolt or pin offset forwardly from and formed integral with or fixedly attached to the body portion M of the bolt plate, while I! designates a fence lever pivotally attached to the bolt plate and having a dog 18 at its free end for engagement with the notch II in the drive wheel. A fence 19 extends laterally from the fence lever and is arranged to engage the gates l3 in the tumblers.

The bolt plate includes a shoulder or enlargement 2i arranged in the path of pins 22 on the drive wheel, so that by turning the dial and drive wheel, the bolt plate and bolt are moved from unlocked position back to locked position. 23 is a spring for actuating the fence lever toward the tumblers, 24 is a cam surface formed in one side wall of the housing to hold the fence lever engaged with the tumblers during move ment of the bolt plate, and 25 is a recess to permit the fence lever to move out of engagement with the drive wheel, see Fig. 3.

In order to guide the bolt Ill endwise during its sliding movement, the housing is provided with a boss 25 having a semi-cylindrical recess 2! therein and the rear wall or back plate 5 is provided with a boss 28 having a semi-cylindrical recess 29 therein so that when the rear wall is assembled and attached to the side and end walls of the housing, the boss 28 of the rear wall lies against the boss 25 of the housing and the recesses 21 and 2S cooperate to afford a cylindrical guide for the bolt or pin l5 and insure its proper movement within the housing toward and away from the end wall i. The rear wall has its inner surface in juxtarelation iii) to the adjacent surface of the bolt plate M which is held and guided by the rear wall. In this manner, the bolt plate underlies the tumbler mechanism and drive wheel which are concentrically arranged, and the housing requires only additional area surhcient to allow movement of the bolt into a hasp staple.

The lock is attachable to a hasp staple that may extend from a drawer, door, or other part to be secured, and the lock is insertable over such hasp staple through an opening (H in the rear wall and boss 26, and a recess 323 formed in the boss 26 within the housing.

The parts thus far described are substantially the same as disclosed in copending application Serial No. 183,192, filed October 3, 1959, and this application has to do with mechanism that automatically effects upsetting or scrambling of the tumblers as the bolt and bolt plate are moved from unlocked position to locked position, in order to necessitate operating the dial and finding the combination each time the bolt is to be unlocked, and eiiectually preventing moving the bolt from locked to unlocked position by a mere movement of the dial and drive wheel.

To accomplish this, there is provided a tumblerupsetting mechanism comprising a tumbler engaging spring catch 33 that is fixedly mounted on a block 3d which is niovably supported on the bolt plate, the catch 33 being arranged to engage with notches 65 in adjacent disks of two tumblers when the tumblers are in the position which they occupy when the bolt plate is in unlocked position.

The block 34 is supported and movable on an upstanding supporting portion 35 formed as part of an extension 3'! on the bolt plate, the

lock 34 having a depending stop lug 323 that engages one edge of the bolt plate and limits movement of the block and spring catch in one direction. 39 designates a spring connected to a post 4| on the bolt plate and to the depending portion of the block and acting to restore the block and spring catch to initial position when the tumblers with which the catch engages are released. The boss 25 in the housing is provided with a recess 42 adjacent to one side wall which receives the block 34 and guides the same during its endwise movement in the housing with the bolt plate or independently of the bolt plate as the case may be.

33 designates a spring arranged between the rear Wall of the housing and the bolt plate and acting to hold the latter in proper relationship to the drive wheel and tumbler mechanism. In order to secure the rear wall 5 to the housing, the side walls 2 may be cut away at their outer edges to afford a recess within which the rear wall 5 is located, and the rear and side walls provided with adjacent openings to afford a cylindrical recess 44 within which pins 45 are driven and tightly fitted to secure the rear wall fixedly and permanently in position in the hous- The operation of the tumbler upsetting mechanism briefly is as follows: Assuming the parts to be in the position illustrated in Fig. 3, to open the lock, the dial and tumblers are manipulated in accordance with the well known practice in the operation of combination tumbler locks, and after the gates of the tumblers are all alined to permit the fence to drop into the gates, further movement of the dial rotates the drive wheel which engages the dog on the fence lever, the fence lever having moved into position for engagement by the dog, and the bolt and bolt plate are moved to unlocked position as shown in Figs. 4 and 8. At the same time the tumbler upsetting spring catch 33 is moved with the bolt plate, and engages the notches in the edges of the tumblers, interlocking with the notches in the tumblers which are arranged so as to be engaged by the spring catch when the tumblers have reached positions corresponding to the innermost position of the bolt and bolt plate. During this movement, the spring catch 33 and block 34 on which it is mounted move with the bolt plate, and upon return movement as the bolt mov es toward locking position, the bolt plate moves independently of the spring catch 33 and block 34 and the spring 39 is put under tension, since the catch 33 cannot move until the bolt and bolt plate have been returned far enough to disengage the fence l9 from the tumblers and release the tumblers. As the bolt I 6 reaches locking position, the drive wheel moves dog l8 outwardly, disengaging fence II! from the tumblers and releasing the tumblers for free movement on the arbor 6. Thereupon spring 39 immediately retracts the spring catch 33 to its normal position,

thus spinning the tumblers with which it is engaged and disarranging the combination, so that before the bolt can again be moved to unlocked position, the dial 1 must be operated in accordance with the predetermined combination and the tumblers again brought to position where the fence lever is released.

While the invention has been described with reference to the particular construction herein shown, it is not confined to the precise arrangement and details illustrated, and this application is intended to cover such modifications or departures as may come within the purposes of the improvement and the scope of the following claims.

We claim:

1. A combination lock comprising a housing having front and rear walls, a dial rotatable on said front wall, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and said front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a bolt plate underlying said tumblers and drive wheel, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upsetting mechanism comprising a tumbler engaging catch and a block carrying said catch, a supporting portion on the bolt plate on which said block is slidable, guiding means engaging the block and controlling its movement in a direction parallel to the movement of the bolt plate, and a spring connecting said block with said bolt plate and permitting movement of the block on said supporting portion, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position.

2. A combination lock comprising a housing having front and rear walls, a dial rotatable on said front wall, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and said front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a bolt plate underlying said tumblers and drive wheel, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upsetting mechanism comprising a tumbler engaging catch and a block carrying said catch, an upstanding supporting portion on the bolt plate on which said block is slidable, guiding means engaging the block and controlling its movement in a direction parallel to the movement of the bolt plate, :1 depending guiding portion on said block engaging one side of said supporting portion, a stop lug on said depending portion engaging an edge of the bolt plate and limiting movement of the block in one direction, and a spring connecting said block with the bolt plate and permitting longitudinal movement of the block on said supporting portion While effecting its return when the block is released, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position.

3. A combination lock comprising a housing having front and rear walls, a dial rotatable on said front wall, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and said front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a bolt plate underlying said tumblers and drive wheel, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upsetting mechanism comprising a tumbler engaging catch and a block carrying said catch, a supporting portion on the bolt plate on which said block is slidable, a spring connecting said block with said bolt plate and permitting movement of the block on said supporting portion, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, and a boss within the housing having a recess therein which receives said block and within which the block is movable and guided endwise.

4. A combination lock comprising a housing having front and rear walls, a dial rotatable on said front wall, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and said front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a bolt plate underlying said tumblers and drive wheel, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upsetting mechanism comprising a tumbler engaging catch and a block carrying said catch, an upstanding supporting portion on the bolt plate on which said block is slidable, a depending guiding portion on said block engaging one side of said supporting portion, a stop ing on said depending portion engaging an edge of the bolt plate and limiting movement of the block in one direction, a spring connecting said block with the bolt plate and permitting longitudinal movement of the block on said supporting portion while effecting its return when the block is released, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, and a boss within the housing having a recess therein which receives said block and within which the block is movable and guided endwise.

5. A combination lock comprising a housing having front and rear walls, a dial rotatable on said front wall, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and said front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a bolt plate underlying said tumblers and drive wheel, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upsetting mechanism comprising a tumbler engaging catch and a block carrying said catch, an upstanding supporting portion on the bolt plate on which said block is slidable, a depending guiding portion on said block engaging one side of said supporting portion, a stop lug on said depending portion engaging one edge of the bolt plate and limiting movement of the block in one direction, a spring connecting said depending portion with the portion of the bolt plate adjacent to said supporting portion, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, and a boss within the housing having a recess therein which receives and guides said block for movement endwise of the bolt plate independently of the bolt plate.

6. A combination padlock comprising a housing having front, rear, side, and end walls, the rear wall having an opening therein adjacent to one end of the housing to receive a hasp staple, a dial rotatable on said front wall adjacent to the other end of the housing, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and said front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a shoulder on the inner end of said arbor, a bolt plate including a body portion underlying said tumblers and drive wheel and having a slot embracing said arbor and guided between said shoulder and the rear wall of the housing, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upsetting mechanism comprising a tumbler engaging catch, a block carrying said catch, an extension on said bolt plate, an upstanding supporting portion on said extension upon which the block is slidable, guiding means engaging the block and controlling its movement in a direction parallel to the movement of the bolt plate, a depending guiding portion on said block engaging one side of said supporting portion, a stop lug on one side of said depending portion engaging an edge of the bolt plate and limiting movement of the block in one direction, a spring connecting said block with the bolt plate and permitting longitudinal movement of the block on said. supporting portion while effecting its return when the block is released, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, said catch being located and movable in a direction tangential to the outer edges of the tumblers, and a bolt carried by the bolt plate and movable endwise of the housing transversely of the opening in the rear wall.

7. A combination padlock comprising a housing having front, rear. side, and end walls, the rear wall having an opening therein adjacent to one end of the housing to receive a hasp staple, a dial rotatable on said front wall adjacent to the other end of the housing, an arbor journalled in said front Wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and said front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a shoulder on the inner end of said arbor, a bolt plate including a body portion underlying said tumblers and drive wheel and having a slot embracing said arbor and guided between said shoulder and the rear wall of the housing, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, a pin on the drive wheel projecting toward the bolt plate, a shoulder on the bolt plate in the path of said pin, tumbler upsetting mechanism comprising a tumbler engaging catch, a block carrying said catch, an extension on said bolt plate, an upstanding supporting portion on said extension upon which the block is slidable, guiding means engaging the block and controlling its movement in a direction parallel to the movement of the bolt plate, a depending guiding portion on said block engaging one side of said supporting portion, a stop lug on one side of said depending portion engaging an edge of the bolt plate and limiting movement of the block in one direction, a spring connecting said block with the bolt plate and permitting longitudinal movement of the block on the supporting portion while effecting its return when the block is released, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, said catch being located and movable in a direction tangential to the outer edges of the tumblers, and a bolt carried by the bolt plate and movable endwise of the housing transversely of the opening in the rear wall.

8. A combination padlock comprising a housing having front, rear, side, and end walls, the rear wall having an opening therein adjacent to one end of the housing to receive a hasp staple, a dial rotatable on said front wall adjacent to the other end of the housing, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and said front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a shoulder on the inner end of said arbor, a bolt plate including a body portion underlying said tumblers and drive wheel and having a slot embracing said arbor and guided between said shoulder and the rear wall of the housing, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upsetting mechanism comprising a tumbler engaging spring catch, a block carrying said catch, an extension on said bolt plate, an upstanding supporting portion on said extension upon which the block is slidable, a depending guiding portion on said block engaging one side of said supporting portion, a stop lug on one side of said depending portion engaging an edge of the bolt plate and limiting movement of the block in one direction, a spring connecting said block with the bolt plate and permitting longitudinal movement of the block on said supporting portion while effecting its return when the block is released, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, said catch being located and movable in a direction tangential to the outer edges of the tumblers, a boss within the housing adjacent to one side wall having a recess within which said block is movable and guided endwise, and a bolt carried by the bolt plate and movable endwise of the housing transversely of the opening in the rear wall.

9. A combination padlock comprising a housing having front, rear, side, and end walls, the rear wall having an opening therein adjacent to one end of the housing to receive a hasp staple, a dial rotatable on said front wal1 adjacent to the other end of the housing, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and said front; wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a shoulder on the inner end of said arbor, a bolt plate including a body portion underlying said tumblers and drive wheel and having a slot embracing said arbor and guided between said shoulder and the rear wall of the housing, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, a pin on the drive wheel projecting toward the bolt plate, a shoulder on the bolt plate in the path of said pin, tumbler upsetting mechanism comprising a tumbler engaging spring catch, a block carrying said catch, an extension on said bolt plate, an upstanding supporting portion on said extension upon which the block is slidable, a depending guiding portion on said block engaging one side of said supporting portion, a stop lug on one side of said depending portion engaging an edge of the bolt plate and limiting movement of the block in one direction, a spring connecting said block with the bolt plate and permitting longitudinal movement of the block on said supporting portion while effecting its return when the block is released, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, said catch being located and movable in a direction tangential to the outer edges of the tumblers, a boss within the housing adjacent to one side wall having a recess within which said block is movable and guided endwise, and a bolt carried by the bolt plate and movable endwise of the housing transversely of the opening in the rear wall.

10. A combination padlock comprising a housing having front, rear, side, and end walls, the rear wall having an opening therein adjacent to one end of the housing to receive a hasp staple, coacting bosses on the inner surfaces of the front and rear walls having semi-cylindrical portions affording a cylindrical guideway, a bolt movable in said guideway, said bosses having recesses coincident with the aforesaid opening in the rear wall, a dial rotatable on said front wall adjacent to the other end of the housing, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and the front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a bolt plate including a body portion underlying said tumblers and drive wheel and having said bolt integrally attached in offset relation, the body portion of the bolt plate being slidably mounted between said drive wheel and said rear wall, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upsetting mechanism comprising a tumbler engaging spring catch, a block carrying said catch, an extension on said bolt plate, an upstanding supporting portion on said extension upon which the block is slidable, a depending guiding position on said block engaging one side of said supporting portion, a stop lug on one side of said depending portion engaging an edge of the bolt plate and limiting movement of the block in one direction, and a spring connecting said block with the bolt plate and permitting longitudinal movement of the block on said supporting portion while effecting its return when the block is released, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, said catch being located and movable in a direction tangential to the outer edges of the tumblers, said bolt being movable endwise of the housing transversely of said opening in the rear wall, and said boss on the front wall having a recess therein which receives said block and within which the block is guided and movable endwise with and independently of the bolt plate.

11. A combination padlock comprising a housing having front, rear, side, and end walls, the rear wall having an opening therein adjacent to one end of the housing to receive a hasp staple, coacting bosses on the inner surfaces of the front and rear walls having semi-cylindrical portions affording a cylindrical guideway, a bolt movable in said guideway, said bosses having recesses coincident with the aforesaid opening in the rear wall, a dial rotatable on said front wall adjacent to the other end of the housing, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and the front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a shoulder on the inner end of said arbor, a bolt plate including a body portion underlying said tumblers and drive wheel and having a slot embracing said arbor and guided between said shoulder and the rear wall of the housing, the bolt plate having said bolt integrally attached in oiTset relation and positioned intermediate said front and rear walls, a fence lever pivoted on said bolt plate and having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upseting mechanism comprising a tumbler engaging spring catch, a block carrying said catch, an extension on said bolt plate, an upstanding supporting portion on said extension upon which the block is slidable, a depending guiding portion on said block engaging one side of said suporting portion, a stop lug on one side of said depending portion engaging an edge of the bolt plate and limiting movement of the block in one direction, and a spring connecting said block with the bolt plate and permitting longitudinal movement of the block on said supporting portion while effecting its return when the block is released, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, said catch being located and movable in a direction tangential to the outer edges of the tumblers, said bolt being movable endwise of the housing transversely of said opening in the rear wall, and said boss on the front wall having a recess therein which receives said block and within which the block is guided and movable endwise with and independently of the bolt plate.

12. A combination padlock comprising a housing having front, rear, side, and end walls, the rear Wall having an opening therein adjacent to one end of the housing to receive a hasp staple, coacting bosses on the inner surfaces of the front and rear walls having semi-cylindrical portions affording a cylindrical guideway, a bolt movable in said guideway, said bosses having recesses coincident with the aforesaid opening in the rear wall, a dial rotatable on said front wall adjacent to the other end of the housing, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and the front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a bolt plate including a body portion underlying said tumblers and drive wheel and having attached in offset relation, the body portion of the bolt plate being slidably mounted between said drive wheel and said rear wall, a pin on the drive wheel projecting toward said bolt plate, a shoulder on the bolt plate in the path of said pin, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upsetting mechanism comprising a tumbler engaging spring catch, a block carrying said catch, an extension on said bolt plate, an upstanding supporting portion on said extension upon which the block is slidable, a depending guiding portion on said block engaging one side of said supporting portion, a stop lug on one side of said depending portion engaging an edge of the bolt plate and limiting movement of the block in one direction, a spring connecting said block with the bolt plate and permitting longitudinal movement of the block on said supporting portion while effecting its return when the block is released, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, said catch being located and movable in a direction tangential to the outer edges of the tumblers, said bolt being movable endwise of the housing transversely of the opening in the rear wall, and said boss on the front wall having a recess therein which receives said block and within which the 6 block is guided and movable endwise with and independently of the bolt plate.

13. A combination padlock comprising a houssaid bolt integrally ing having front, rear, side, and end walls, the rear wall having an opening therein adjacent to one end of the housing to receive a hasp staple, coacting bosses on the inner surfaces of the front and rear walls having semi-cylindrical portions affording a cylindrical guideway, a bolt movable in said guideway, said bosses having recesses 00- incident with the aforesaid opening in the rear wall, a dial rotatable on said front wall adjacent to the other end of the housing, an arbor journalled in said front wall and having said dial fixedly mounted thereon, a drive wheel fixed on the inner end of said arbor, a multiplicity of tumblers loosely mounted on the arbor between said drive wheel and the front wall of the housing, said tumblers being operatively associated with said drive wheel and arbor, a shoulder on the inner end of said arbor, a bolt plate including a body portion underlying said tumblers and c drive wheel and having a slot embracing said arbor and guided between said shoulder and the rear Wall of the housing, the bolt plate having said bolt integrally attached in offset relation and positioned intermediate said front and rear walls, a pin on the drive wheel projecting toward said bolt plate, a shoulder on the bolt plate in the path of said pin, a fence lever pivoted on said bolt plate having a fence cooperating with said tumblers and a dog cooperating with said drive wheel, tumbler upsetting mechanism comprising a tumbler engaging spring catch, a block carrying said catch, an extension on said bolt plate, an upstanding supporting portion on said extension upon which the block is slidable, a depending guiding portion on said block engaging one side of said supporting portion, a stop lug on one side of said depending portion engaging an edge of the bolt plate and limiting movement of the block in one direction, a spring connecting said block with the bolt plate and permitting longitudinal movement of the block on said sup-porting portion while effecting its return when the block is released, at least one of the tumblers having a notch in its edge that is engaged by said catch when the bolt plate is in unlocked position, said catch being located and movable in a direction tangential to the outer edges of the tumblers, said bolt being movable endwise of the housing transversely of said opening in the rear wall, and said boss on the front wall having a recess therein which receives said block and within which the block is guided and movable endwise with and independently of the bolt plate.

OTTO H. EIFFERT. HOWARD S. THOMAS, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 821,548 Streeter et al. May 22, 1906 906,803 Jervey Dec. 15, 1908 1,084,764 Storr Jan. 20, 1914 2,224,875 Machinist Dec. 17, 1940 2,244,152 Hamilton June 3, 1941 

